Loose-leaf binder



Dec. 11, 1928,

W. F. WOLF LOOSE LEAF BINDER Filed Mgrdh s, 1928 MYLTER Fh QLF.

ATTORNEY WITNESS:

Patented Dec. 11, 1928.,

um'rso sir-Mes- WALTER F. WOLF, or NEW Yorugiv. Y.

LOOSE-LEAF BINDER.

Application filed March 3, 1928. Serial No;'2 58,932.

through the openings in the loose leaf sheets after they havebeen removed from the binders for locking the sheets in a bound condition against separation, and which differs from the construction shown in the above pending application in that the binder post is threaded or screwed to a locked position tional locking position. Another object of the invention is to provide a binder post which includes .a screw threadedly connected to one of the. original loose-leaf binding'posts, and atubular sleeve provided with a clamping flange and which sleeve threads over said .screw for setting up a clamping action between the sleeve and lower post section to hold the loose leaf sheets therebetween in a clamped condition, the threads between the screw and theoriginal post section being looser co-acting threads than those between the screw andthe sleeve to facilitate of the connection of the screw with the post section p-riorto the turning of the sleeve with respect to the stud when turning the sleeve to effect a binding of the sheets. \Vith these and other objects in view, the invention resides in certain novel construction and combination and arrangement of parts, the essential features ofwhich are hereinafter fully described, are particularly pointed out in the appended claims, and are illustrated in the accompanying drawing, in which Figure 1 is a perspective view of a plurality of loose-leaf sheets partially bound.

Y Figure '2 is a vertical sectional view on the line 2-2 of Figure 1.

Figure 3 is a detail perspective view of the binder post in a separated condition.

Referring particularly to the drawing, the numeral 10 designates my improved binding post in its entirety, which includes a threaded screw 11 having a reduced threaded stud 12 extending from one end thereof, while the opposite end is provided with a kerf 13. The threads on the screw and stud are of the same direction for a purpose to be hereinafter explained.

Conant-mg with the screw 11. is a tubular rather than by driving the same into tric sleeve member 14' which is internally screw threaded as at 15 for a' portion of its length.

The outer end oi the sleeve member is pro-' vided with an annular flange. 16 having a kert' 17 in the outer tace thereot. The tubular sleeve member threads over the screw 11 and the threads therebetween are of a relatively tight lit compared to the fit of the threads on the studl2 and the base post section- 18 with which it connects. 2 i I In Figures land 2 oi the drawing, I have showna' plurality of loose-leaf sheets 19 park tialy bound between a pair of covers ,20. The front cover or" the loose leaf. binder in which they were temporarily held until ready for permanent binding has been removed but the back cover section 21 of the binder still remains associated with the loose leaves. The binder back 21 includes a base strip 22 in which a collar 23 is mounted adjacent each end, and through which a threaded stud 24 extends. The threaded stud screws into the lower end'of the base post section 25 of the binder proper which supports the other sections which have been removed. In applying the improved binder post for permanent binding of the volume of loose-leaves,

certain of theori-ginal binder post sections are removed, leaving the, base post section and, or'certain of the other post sections intact, dependingupon the thickness of the volume to be bound. As shown in the drawing, allot; the original binder post sections have been removed'with the exception ofthe' base section 18.. The operator proceeds to threadedly. connect the sleeve 14 with the screw and insertsthe same in the aligned binderpost'openings26 in the loose leaves. By imparting a turning movement to the flangeclend otthe sleeve member, thestud 12 will thread into the threaded socket 27 in the base post member 18, as the tight fit between the threads on the sleeve and screw allows the stud 12 to be screwed home before the sleeve begins to turn with, respect to the screw. When the stud 12 reaches the limit of its movement into the base post section. 18, the tubular sleeve begins to move downward over the screw, until the flange is tightly pressing upon the front cover 20. If necessary, a screw driver may be inserted in either of the kerfs 13 and 17 to increase the clamping action between the parts. The studs 24 may now be removed and the'binder back 21 separated the bound sheets and 7 leaves for permanent binding.

While 1 have described whatl deem to be the most desirable embodiment of my invention, it is obvious that many of the details may be variedwlthout 1n any way departing :lrom the spirit t my invention, and iIitl'i'er r fore do not limit myself to the exact details of construction. herein set tortlrnorto any thing less than the whole of my invention limited only hythe appended claims;

Vliat is claimed as new is zl.. In" combination. with a plurality of stacked loose-le ves, a binder post seetion'extending partially throrigh the thickness of said plurality of loosedeaves from one side of the same, a screw threaded to said pest section, anda sleeve extendingthrough-the opposite side of said plurality of loose leaves and provided with internal screw threads for threading engagement with; said screw, the threaded connection between said sleeve and screw being vot a tighter fit= than the threaded connection between-said screw and post section. a

2. In combination with a plurality of stacked loose-leaveshavi aligned binder post openings-thereon defining a continuous passage tl-ierethrougln a binder postsection extending partially-through said continuous passage from one side ot said loose-leaves and provided with a flange for engagement with oneofthe outer loose-leaves, said binder post section having a threaded socket therein, a screw provided with a reduced threaded stud in threaded engagen'ient with; said threaded socket, an internally screw threadedsleeve extending into said passage from the oppo site sideo'l: said loosedeaves and threadedly engaging said scre-w and aflange provided on the outer end of said sl'cevefor clamping engagement with the" other outer'loose-leaf.

3. In combination with a plurality] of stacked loose-leaves having aligned binder post openings therein defining a continuous passage therethrough; a binderpostsection ext-ending partiall-ythroug 1 said continuous passage from one-side-ofsaid-looselleaves and provided with a flange for engagement with one of the-outer loose-leaves,said binder post section having a threaded socket therein, a

tion-between said stud and said socket;

4. In combination with aplurality of stacked-loose-leaves having alignedbin derpost "openings therein defining a continuous passage therethrough, a binder post section extending partially through said continuous passage fromone side of said looso 'leaves and'provic'led with a iiange for engagement withone-o'f the=outer loose-leaves, said binder post-section having a'th'reade'd socket therein, a screw provided with a reduced stud in threaded engagement with said threaded socket, an internally screw threaded sleeve extending into said passage from the oppo' site side of said loose-leaves and threadedly engaging said serew, and: a fiange provided on the outerend of said sleeve toriclamping engagement with the other: outer loose-leaf, the threaded connection between said sleeve and screw being of a'itighterlfit than the threaded :eonnection between said stud and said socket, and kerfs provided tin the outer ends-of said. screw and sleeve.

5., A binder post comprising a post section having athreadedsoeketin oneend and a flangeoon the opposite end. thereof, a screw provided Withia reduced threaded stud for threading engagementrwith said threaded socket, an internally screw threaded sleeve for threading engagement -.with' said screw, anda flange provided on theouter end of said sleeve, the threaded connection between said screw and sleeve beingiot a. tighter fit than the threaded 'connection between said stud and socket. V

'In testlmonywhereof IhaVe aflixed my signature. i I

WALTER: F. WOLF. 

